JPH0240815A - Antiexplosion insulator tube for insulating apparatus including gas or oil - Google Patents

Abstract

PURPOSE:To make it possible to suppress the scattering of broken pieces in an explosion to the minimum by installing insulating bands which consist of a high polymer material of a resin, a rubber, or the like, in the contacting condition to the outer peripheries of the trunks of an insulator tube main body. CONSTITUTION:Insulating bands 4 which consist of a high polymer material are installed in the contacting condition at the peripheries of trunks 3 which are straight parts between umbrellas 2 and 2 of an insulator tube main body 1. As a result, the insulating bands 4 are installed in the closely contacting condition at the peripheral surfaces of the trunks 3 where the thickness is the smallest in the insulator tube main body 1 and the stress in the breaking is liable to concentrate. Consequently, even when the pressure inside the insulator tube rises abnormally for some cause and the insulator tube main body 1 is exploded, the insulating bands 4 of the high polymer material with an excellent elasticity absorb the energy of explosion, suppress the scattering of broken pieces to the minimum, and the danger to a human body, a damage to the peripheral apparatuses, and the like can be prevented.

Description

Detailed Description of the Invention (Industrial Application Field) The present invention is applicable to gas-filled insulating equipment such as gas bushings, current transformers, and lightning arresters in which insulating gas is filled inside, transformer bushings, and transformers. Gas or oil-filled insulating equipment used in oil-filled insulated equipment that has insulating oil sealed inside, and can minimize the scattering of fragments in the event of an explosion.
This relates to explosion-proof insulators for equipment.

(Prior art) Gas circuit breakers, air termination terminals such as gas busbars, gas insulated current transformers, etc. are filled with high-pressure insulating gas such as SF6 gas or N2 gas inside the insulating tube. If the crank breaks in, the internal pressure will cause debris to scatter around, injuring workers, or destroying insulators, etc. of nearby electrical equipment.
There is a risk of causing the next disaster. In addition, in oil-filled insulated equipment such as transformer bushings and transformers, if the internal insulation deteriorates for some reason and an arc occurs inside, the pressure inside the insulating pipe will rise abnormally due to vaporization of the insulating oil. The insulator may explode and break, resulting in a major accident. For this reason, insulator tubes for gas-filled insulators, especially for 5 ita vessels, have been devised such as installing an explosion-proof inner cylinder inside the insulator tube to absorb the energy in the event of an explosion, as shown in Japanese Patent Laid-Open No. 57-96409. However, there were problems such as the need to replace the insulator tube with a larger inner diameter in order to install it in existing equipment, and the structure of the insulator tube being complicated.

(Problems to be Solved by the Invention) The present invention solves these conventional problems and can effectively prevent fragments from scattering even if the insulator tube is cranked by some external force. It was completed for the purpose of being an explosion-proof insulator for gas or oil-filled insulating equipment.

(Means for Solving the Problems) The present invention is characterized in that an insulating pad made of a polymeric material such as resin or rubber is attached to the outer periphery of the body of the insulator tube body in an adhesive state.

(Example) The present invention will now be described in detail with reference to the illustrated embodiments.

In the first embodiment shown in FIG. 1, (1) is a porcelain insulator tube body used for gas-filled insulating equipment or oil-filled insulating equipment, (2) is its cylindrical portion, and (3) is its body. It is. (
4) is an insulating band made of a polymeric material wrapped around the outer periphery of the body (3) of the insulator main body (1). The insulating band (4) must be made of a material with excellent elasticity and tensile strength that can absorb energy during an explosion, such as ethylene propylene rubber, butyl rubber, urethane rubber, chloroprene rubber, or nitrile rubber. It is preferable to use The insulating band (4) is preferably chevron-shaped as shown in FIG. 2 to have sufficient strength. Such an insulating band (4) is attached in an adhesive state to the outer periphery of the body part (3), which is a straight part between the cylindrical parts (2), (2) of the insulator main body (1). If the insulating band is made of urethane rubber, at the time of bonding, apply an adhesive such as urethane rubber adhesive to the adhesive part of the insulator tube body (3), and apply or spray the urethane rubber material to the insulator tube body (3). Adhesion is formed by this. Also, the insulation band (
If 4) requires more strength, a material with sufficient tensile strength, such as steel wire, steel band, nylon wire, nylon band, high-strength rubber, etc., can be used as a reinforcing core material (as shown in Figure 3). 5) can be reinforced.

In the second embodiment shown in FIG. 4, the insulator main body (1) is an inclined insulator having a spiral cylindrical portion (2), and the insulating band (4) is attached to the outer periphery of the spiral body (3). is continuously wrapped around. The upper and lower ends thereof are fixed in parallel with the cap fittings (7) and (8), but the other parts are the same as in the first embodiment. In any of the embodiments, the insulating band (4) does not necessarily have to be wrapped around the entire body or the entire circumference.

In the third embodiment shown in FIG. 5, an insulating band (4) made of rubber previously formed into a linear shape is attached to the outer periphery of the body (3) of the insulator body (1) in an adhesive state. In this case, when more strength is required for the rubber, a material with sufficient tensile strength, such as steel wire, copper wire, nylon wire, etc., is used as the reinforcing core material (5) as shown in Figures 6 and 7. Rubber can be reinforced. Note that other points are similar to other embodiments.

FIG. 8 shows still another embodiment of the present invention, in which an insulating band (4) is bonded to the outer periphery of the body (3) of the insulator body +1), and also to the outer surface of the cylindrical part (2). A wide insulating band (6) is glued on. Such an insulating band (4),
(6) has the effect of preventing the explosion of the insulator tube caused by flying objects from the outside, and also has the effect of suppressing the scattering of fragments in the form of small lumps.

(Function) The insulator constructed as described above has the thinnest wall thickness in the insulator main body (1), and the body (
Since the insulating band (4) is adhesively attached to the outer circumferential surface of the insulator (3), even if the pressure inside the insulator tube (1) explodes due to an abnormal increase in the pressure inside the insulator tube, the elasticity will be maintained. The insulating band (4) made of a polymer material with excellent properties absorbs the energy of the explosion and minimizes the scattering of fragments, thereby preventing danger to the human body and damage to peripheral equipment. At this time, since the insulating band (4) and the surface of the insulator tube are in a bonded state, fragments of the insulator tube are prevented from forming into small lumps, and the scattering distance thereof can be shortened. Moreover, by providing the insulating band (4), the surface leakage distance of the insulator main body (1) increases, further improving the fouling characteristics. (3)
It also has the effect of protecting it from external forces such as stones being thrown. Also, the 8th
If an insulating band (6) is also bonded to the sub-portion (3) as shown in the figure, this effect will be further improved.

(Effects of the Invention) As is clear from the above description, the present invention can not only minimize the scattering of fragments during an explosion, but also improve the electrical and mechanical properties of the insulator. It has many advantages, such as being easy to apply to existing equipment, having a simple structure, and being inexpensive to manufacture. Therefore, the present invention greatly contributes to the development of industry as an explosion-proof insulated pipe for gas or oil-filled insulating equipment that solves the problems of the conventional art.

[Brief explanation of the drawing]

FIG. 1 is a front view showing a first embodiment of the present invention, FIG. 2 is a partial sectional view of the main part thereof, FIG. 3 is a partial sectional view of the main part showing a modification thereof, and FIG. 4 is a main part of the main part. FIG. 5 is a front view showing the second embodiment of the invention, FIG. 5 is a front view showing the third embodiment of the invention, and FIGS. 6 and 7 show the reinforcing core material used in the third embodiment. FIG. 8 is a perspective view of the insulating band and a partial sectional view showing the fourth embodiment. (1: Insulator main body, (2): Subpart, (3): Body, (4
): Insulating band, (5): Reinforcing core material, (6): Insulating band.

Claims (1)

[Claims] 1. A gas characterized in that an insulating band (4) made of a polymeric material such as resin or rubber is attached to the outer periphery of the body (3) of the insulator main body (1) in an adhesive state. Or explosion-proof insulators for oil-filled insulated equipment. 2. The explosion-proof insulator for gas or oil-filled insulated equipment according to claim 1, wherein an insulating band (6) is also attached in an adhesive state to the outer surface of the cap (2) of the insulator main body (1). 3. The explosion-proof insulating pipe for gas- or oil-filled insulating equipment according to claim 1 or 2, wherein the insulating band (4) is reinforced with a reinforcing core material (5).